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Subject[PATCH v3 12/12] cpuset: export effective masks to userspace
cpuset.cpus and cpuset.mems are the configured masks, and we need
to export effective masks to userspace, so users know the real
cpus_allowed and mems_allowed that apply to the tasks in a cpuset.

v2:
- export those masks unconditionally, suggested by Tejun.

Signed-off-by: Li Zefan <lizefan@huawei.com>
---
kernel/cpuset.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 65878a7..53a9bbf 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1535,6 +1535,8 @@ typedef enum {
FILE_MEMORY_MIGRATE,
FILE_CPULIST,
FILE_MEMLIST,
+ FILE_EFFECTIVE_CPULIST,
+ FILE_EFFECTIVE_MEMLIST,
FILE_CPU_EXCLUSIVE,
FILE_MEM_EXCLUSIVE,
FILE_MEM_HARDWALL,
@@ -1701,6 +1703,12 @@ static int cpuset_common_seq_show(struct seq_file *sf, void *v)
case FILE_MEMLIST:
s += nodelist_scnprintf(s, count, cs->mems_allowed);
break;
+ case FILE_EFFECTIVE_CPULIST:
+ s += cpulist_scnprintf(s, count, cs->effective_cpus);
+ break;
+ case FILE_EFFECTIVE_MEMLIST:
+ s += nodelist_scnprintf(s, count, cs->effective_mems);
+ break;
default:
ret = -EINVAL;
goto out_unlock;
@@ -1786,6 +1794,18 @@ static struct cftype files[] = {
},

{
+ .name = "effective_cpus",
+ .seq_show = cpuset_common_seq_show,
+ .private = FILE_EFFECTIVE_CPULIST,
+ },
+
+ {
+ .name = "effective_mems",
+ .seq_show = cpuset_common_seq_show,
+ .private = FILE_EFFECTIVE_MEMLIST,
+ },
+
+ {
.name = "cpu_exclusive",
.read_u64 = cpuset_read_u64,
.write_u64 = cpuset_write_u64,
--
1.8.0.2


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